package servlet.ogrenci;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import siniflar.DersOgrenci;
import siniflar.Ogrenci;
import siniflar.OgretimUyesi;
import vt.Veritabani;


public class Transkript extends HttpServlet {

    /**
     * Processes requests for both HTTP
     * <code>GET</code> and
     * <code>POST</code> methods.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setCharacterEncoding("UTF-8");
        request.setCharacterEncoding("UTF-8");
        HttpSession oturum = request.getSession();

        Boolean ogrenciDurum = (Boolean) oturum.getAttribute("ogrenciDurum");
        if (ogrenciDurum == null) {
            ogrenciDurum = false;
        }

        if(ogrenciDurum){
            ArrayList<ArrayList<DersOgrenci>> notlar = null;
                Ogrenci ogrenci = (Ogrenci)oturum.getAttribute("ogrenci");
                
                Veritabani vt = new Veritabani();
                notlar = vt.ogrenciNotlari(ogrenci);
                
                System.out.println("notlar: " + notlar);
                
                // bir sorun yoksa diğer sayfaya bilgileri gönder
                if (notlar != null) {
                    oturum.setAttribute("notlar", notlar);
                    oturum.setAttribute("ogrenciDurum", true);
                    yonlendir(request, response, "transkript.jsp");
                    return;
                } else {
                    oturum.setAttribute("hata", "Hatalı parametreler");
                    oturum.setAttribute("ogrenciDurum", false);
                    yonlendir(request, response, "giris.jsp");
                    return;
                }
        }
        else{
            oturum.setAttribute("hata", "Hatalı öğrenci numarası veya şifre girdiniz.");
            oturum.setAttribute("ogrenciDurum", false);
            yonlendir(request, response, "giris.jsp");
            return;
        }
                
    }
    
    public void yonlendir(HttpServletRequest request, HttpServletResponse response, String adres)
            throws ServletException, IOException {
        RequestDispatcher dispatcher = request.getRequestDispatcher(adres);
        dispatcher.forward(request, response);
    }
    
    private boolean ilkGirisMi(String kontrolEdilen){
        // sayfaya ilk giriş mi?
        if(kontrolEdilen == null){
            // evet!
            return true;
        }
        // hayir
        return false;
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /**
     * Handles the HTTP
     * <code>GET</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP
     * <code>POST</code> method.
     *
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     *
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
